<html>
<head>
    <meta charset="utf-8">
    <style>
    * {
        margin: 0;
        padding: 0;
    }

    body {
        width: 400px;
        height: 100px;
    }

    div {
        line-height: 100px;
        font-size: 42px;
        text-align: center;
    }
    </style>
</head>
<body>
<div id="ip_div">正在查询……</div>
<script src="js/my_ip.js"></script>
</body>
</html>